So I downloaded it. Got in-game and set my settings to red and green bosses. Got into Darkshade Caverns and the addon didn't work. No boss icons showed on the map. I have the compass show option turned off. I double checked my settings and everything looks good so I don't know why it failed to show boss locations.

Update: So I uninstalled it. Deleted the saved variables. Re-installed. Ran Crypt of Hearts and still didn't work.